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CVE-2009-3560

MEDIUM · CVSS 5.0EPSS 24.3%EU EUVD

The big2_toUtf8 function in lib/xmltok.c in libexpat in Expat 2.0.1, as used in the XML-Twig module for Perl, allows context-dependent attackers to cause a denial of service (application crash) via an XML document with malformed UTF-8 sequences that trigger a buffer over-read, related to the doProlog function in lib/xmlparse.c, a different vulnerability than CVE-2009-2625 and CVE-2009-3720.

Key facts

CVSS score
5.0 (v2.0)
Severity
MEDIUM
CVSS vector
AV:N/AC:L/Au:N/C:N/I:N/A:P
Weakness (CWE)
CWE-119
EPSS score
24.3% (98th percentile)
In CISA KEV
No
In EU EUVD
Yes (EUVD-2009-3541)
Published
December 4, 2009
NVD last modified
June 16, 2026
Status
Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2009-3541 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.

View on the EU Vulnerability Database

Affected products

  • apache / http server
  • libexpat project / libexpat
  • xmltwig / xml-twig for perl

References

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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